My theory is if a movie has a single word animal title it will be so bad that it is awesome. I have a whole collection of DVDs following this rule and most of them are really funny (unintentionally).
Spiders
Crocodile
Komodo
Anaconda
etc, the list is surprisingly long.
My other theory behind bad movies is anything with a "versus" in the title will be hilarious for all the wrong reasons.
Mega Shark VS. Giant Octopus immediately springs to mind.
Boa VS Python, oh god there is so much wrong with that movie.
Pretty much any of the Godzilla VS *something* movies too.
You might spot that I really like the ole Creature Feature stuff and a lot of them are just awful movies.